Vulnerability Details CVE-2021-30477
An issue was discovered in Zulip Server before 3.4. A bug in the implementation of replies to messages sent by outgoing webhooks to private streams meant that an outgoing webhook bot could be used to send messages to private streams that the user was not intended to be able to send messages to.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 45.9%
CVSS Severity
CVSS v3 Score 4.3
CVSS v2 Score 4.0
References
Products affected by CVE-2021-30477
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cpe:2.3:a:zulip:zulip_server:1.1.5
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cpe:2.3:a:zulip:zulip_server:1.2.0
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cpe:2.3:a:zulip:zulip_server:1.2.1
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cpe:2.3:a:zulip:zulip_server:1.3.0
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cpe:2.3:a:zulip:zulip_server:1.3.1
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cpe:2.3:a:zulip:zulip_server:1.3.10
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cpe:2.3:a:zulip:zulip_server:1.3.11
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cpe:2.3:a:zulip:zulip_server:1.3.12
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cpe:2.3:a:zulip:zulip_server:1.3.13
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cpe:2.3:a:zulip:zulip_server:1.3.2
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cpe:2.3:a:zulip:zulip_server:1.3.3
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cpe:2.3:a:zulip:zulip_server:1.3.4
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cpe:2.3:a:zulip:zulip_server:1.3.5
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cpe:2.3:a:zulip:zulip_server:1.3.6
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cpe:2.3:a:zulip:zulip_server:1.3.7
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cpe:2.3:a:zulip:zulip_server:1.3.8
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cpe:2.3:a:zulip:zulip_server:1.3.9
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cpe:2.3:a:zulip:zulip_server:1.4.0
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cpe:2.3:a:zulip:zulip_server:1.4.1
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cpe:2.3:a:zulip:zulip_server:1.4.2
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cpe:2.3:a:zulip:zulip_server:1.4.3
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cpe:2.3:a:zulip:zulip_server:1.5.0
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cpe:2.3:a:zulip:zulip_server:1.5.1
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cpe:2.3:a:zulip:zulip_server:1.5.2
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cpe:2.3:a:zulip:zulip_server:1.6.0
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cpe:2.3:a:zulip:zulip_server:1.7.0
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cpe:2.3:a:zulip:zulip_server:1.7.1
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cpe:2.3:a:zulip:zulip_server:1.7.2
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cpe:2.3:a:zulip:zulip_server:1.8.0
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cpe:2.3:a:zulip:zulip_server:1.8.1
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cpe:2.3:a:zulip:zulip_server:1.9.0
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cpe:2.3:a:zulip:zulip_server:1.9.1
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cpe:2.3:a:zulip:zulip_server:1.9.2
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cpe:2.3:a:zulip:zulip_server:2.0.0
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cpe:2.3:a:zulip:zulip_server:2.0.1
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cpe:2.3:a:zulip:zulip_server:2.0.2
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cpe:2.3:a:zulip:zulip_server:2.0.3
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cpe:2.3:a:zulip:zulip_server:2.0.4
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cpe:2.3:a:zulip:zulip_server:2.0.5
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cpe:2.3:a:zulip:zulip_server:2.0.6
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cpe:2.3:a:zulip:zulip_server:2.0.7
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cpe:2.3:a:zulip:zulip_server:2.0.8
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cpe:2.3:a:zulip:zulip_server:2.1.0
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cpe:2.3:a:zulip:zulip_server:2.1.1
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cpe:2.3:a:zulip:zulip_server:2.1.2
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cpe:2.3:a:zulip:zulip_server:2.1.3
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cpe:2.3:a:zulip:zulip_server:2.1.4
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cpe:2.3:a:zulip:zulip_server:2.1.5
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cpe:2.3:a:zulip:zulip_server:2.1.6
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cpe:2.3:a:zulip:zulip_server:2.1.7
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cpe:2.3:a:zulip:zulip_server:3.0
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cpe:2.3:a:zulip:zulip_server:3.1